Malicious PDF — malware analysis report

Static analysis result for SHA-256 63825437d4e625ff…

MALICIOUS

PDF

75.9 KB Created: 2021-02-12 15:11:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: e4918cbb3edd46f2f1305fe71747f7e3 SHA-1: 919eef602e61f752135b77691329d0a69f1820e9 SHA-256: 63825437d4e625ff4942ab25bac29c81adb8dd6255087f28de7a368723b139a3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF link farm'. The ClamAV detection and ML classifier strongly indicate maliciousness, likely related to phishing or SEO abuse. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious or spam content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://seumenha.ru/123?utm_term=266+area+code+india PDF link annotation
    • http://bettyloustintruckbbq.com/dometic_dual_zone_thermostat_manualquolr.pdfIn PDF document text
    • https://mozalotajevel.weebly.com/uploads/1/3/2/6/132682758/witoratolusodu.pdfIn PDF document text
    • http://idealica-itufficiale.website/gokomovovoloraweryr38w.pdfIn PDF document text
    • http://respect-ltd.su/airscreen_pro_apk_onhaxssfro.pdfIn PDF document text
    • https://fimedezederuru.weebly.com/uploads/1/3/4/8/134884956/kejipugaketa-tilel-kotofimoxuv-ravelujem.pdfIn PDF document text
    • https://wivutukezed.weebly.com/uploads/1/3/1/4/131438473/kewepe.pdfIn PDF document text
    • http://saratov.ooo/microsoft_powerpoint_slideshow_templateswm7r8.pdfIn PDF document text
    • http://copyright-notice-ig.com/employee_details_form_template_excelk0yt1.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/maruzulujiti.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wulotugadag/class_7_civics_ch_3_question_answer.pdfIn PDF document text
    • https://s3.amazonaws.com/mefadedosuw/62184292237.pdfIn PDF document text
    • http://mogewatiside.epizy.com/96152351491.pdfIn PDF document text
    • https://s3.amazonaws.com/fukezavazuj/chop_steakhouse_nutrition_information.pdfIn PDF document text
    • https://s3.amazonaws.com/nokiva/blouse_designs_catalogue_book.pdfIn PDF document text
    • http://fupuzujovo.epizy.com/cheetah_film_all_song.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/tartini_devil_s_trill_sonata_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/juvuraguvutoxif/english_to_spanish_talking_dictionary_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fixararololu/63039174491.pdfIn PDF document text
    • http://gavojomizam.epizy.com/up_b_e_d_form_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/xedewofuretujo/castrol_edge_extended_performance_10w-_30.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/tamil_new_movies_apk.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e871.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE871 4912 bytes
SHA-256: d1520c331de696cde663d8c7a2f249e6f72b03e3feb6ec21f68b89e9a82a809b
font_01_sfnt_off0000f931.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF931 15084 bytes
SHA-256: 4e26692a9ad0a9e6ce2f8890c72998382474e4466f77ae4ac0db1e0eef628e7e

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